Diazepam Facts
Depressant;
Description
Diazepam — also known as Valium — is a synthetic depressant of the benzodiazepine class. It works by amplifying GABA — the brain's primary calming signal — producing sedation and anxiety relief.
Subjective effects include anxiety suppression, sedation, muscle relaxation, and impaired formation of new memories. The experience is one of smooth, diffuse quieting — anxiety dissolves, the body loosens, and thinking drifts into a warm, unconcerned stillness, marked by a characteristic "delusion of sobriety" in which users consistently underestimate their own impairment.[1]
Diazepam produces physical dependence even at therapeutic doses with sustained use,[2] and withdrawal can trigger life-threatening seizures. The combination with opioids carries the highest mortality risk: deaths rise approximately tenfold compared to opioids alone,[3] because both substances suppress the same brainstem breathing centers through separate mechanisms.
Dose and durationby route · individual sensitivity varies
Starts in 15 – 45 minLasts 4 – 6 hoursAfter-effects 6 – 24 hours
Body and dependence
- Acute toxicity
- Low
- Chronic toxicity
- High
- Physical dependence
- High
- Psychological dependence
- High
- Withdrawal
- Life-threatening · fatal · medical supervision
- Compulsive redosing
- Moderate
Tolerance
- Builds
- Rapid
- Fully resets after
- 14 days
- Carries over to
- alprazolam;
lorazepam; clonazepam; chlordiazepoxide; nitrazepam; temazepam; oxazepam; midazolam; alcohol; barbiturates
Effectslikely at a common dose
- Perception
- Dreaming suppression;
+6 possible, including Visual acuity suppression, Vestibular distortion, Spatial disorientation - Body
- Sedation;
Motor control impairment; Muscle relaxation; Physical fatigue; +10 possible, including Dizziness, Respiratory depression, Nystagmus (eye wobbles) - Thinking
- Cognitive impairment;
Decision impairment; +16 possible, including Analysis suppression, Memory suppression, Information processing suppression - Feeling
- Anxiety suppression;
+3 possible, including Emotional lability - Self
- none likely · 9 possible, including Communication suppression, Craving
- Time
- none likely · 2 possible, including Temporal disorientation
Who shouldn't take it
Combinations60 recorded
Seek help immediately if
- Extreme drowsiness — can't stay awake or be roused
- Confusion, slurred speech, severe loss of coordination
- Slow, shallow, or irregular breathing
- Unconsciousness / unresponsive; limp, floppy body
- Blue lips or fingertips
- Vomiting while sedated (choking / aspiration risk)
- Cold, clammy skin; weak pulse
What to do
- Try to wake them — shout, firm sternal rub
- If unresponsive or breathing is impaired, call emergency services
- Place them in the recovery position — critical, they can choke on vomit
- Monitor breathing continuously; be ready to give rescue breaths / CPR
- Never leave them alone to "sleep it off"
- Do not give other drugs, stimulants, or more depressants
Most depressant overdoses resolve with airway protection, breathing support, and monitoring. The danger is respiratory depression and choking on vomit — sharply worse when combined with opioids or alcohol. GHB/GBL overdoses often involve sudden deep unconsciousness and may self-resolve, but airway protection is essential.
988 Suicide & Crisis LifelineFireside Project: 62-FIRESIDE
References
- [1]^Erwin CW, Linnoila M, Hartwell J, et al. (1986) Effects of buspirone and diazepam, alone and in combination with alcohol, on skilled performance and evoked potentials — Journal of clinical psychopharmacology PMID:3734141
- [2]^Busto U, Sellers EM (1991) Pharmacologic aspects of benzodiazepine tolerance and dependence — Journal of substance abuse treatment PMID:1675689
- [3]^DeHaan M, Radtke L, Hensley C, Hogue A (2020) Determining Efficacy of Intervention in the Limitation of Opioid and Benzodiazepine Co-Prescription — South Dakota medicine PMID:33264528